2PP microfabrication
“2PP microfabrication” stands for two-photon polymerization (2PP) microfabrication. It is an additive manufacturing technique used to create very small, high-resolution 3D structures—often at the micro- to sub-micrometer scale—by focusing a laser into a photosensitive material (a “resin”).
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What “2PP microfabrication” means
“2PP microfabrication” stands for two-photon polymerization (2PP) microfabrication. It is an additive manufacturing technique used to create very small, high-resolution 3D structures—often at the micro- to sub-micrometer scale—by focusing a laser into a photosensitive material (a “resin”).
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How it works (high level)
In 2PP, the resin only polymerizes where the laser intensity is high enough for two-photon absorption. Because that intensity occurs mainly at the focal point, the process enables precise “voxel-by-voxel” writing in 3D. By scanning the laser and controlling exposure, complex micro-optical elements, microfluidic components, scaffolds, and mechanical microstructures can be fabricated. Afterward, unpolymerized resin is typically removed (e.g., by washing/development), leaving the solid 3D pattern.
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Common uses and practical notes
2PP is widely used in research and prototyping for micro-optics (lenses, waveguides), biomedical scaffolds, and microelectromechanical systems (MEMS)-adjacent components. The achievable resolution depends on factors such as laser wavelength, numerical aperture of the objective, resin chemistry, and writing parameters. Safety note: working with lasers and photopolymers requires appropriate eye/skin protection, ventilation, and material-specific handling procedures; follow institutional safety protocols and the resin manufacturer’s safety data sheet (SDS).
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